睫状神经营养因子对面神经损伤的修复作用

目的：探讨局部应用睫状神经营养因子（ＣＮＴＦ）对成年大鼠面神经损伤的修复作用。方法：将雄性ＳＤ大鼠颞骨内面神经垂直段横断后端端吻合，ＣＮＴＦ组以ＣＮＴＦ明胶海绵覆盖损伤处；对照组以生理盐水（ＳＡＬ）的明胶海绵覆盖损伤处。术后ＣＮＴＦ组每周２次耳后皮不注射ＣＮＴＦ５μｇ，对照组同法注射等量ＳＡＬ。术后２，４和１２周各组进行电生理学、组织病理学观察及开矿学定量分析。结果：术后２周，两组电刺面神经均未能

Ciliary neurotrophic factor in the regeneration of facial nerue

OBJECTIVE: To study the role of CNTF in regeneration of facial nerve. METHOD: SD Rat facial nerves in temporal bones were transected and then combined end to end. In ciliary neurotrophic factor group (n = 30), lesions were covered by gelatin sponge soaked with CNTF. In control group (n = 18), lesions were covered by gelatin sponge soaked with normal saline. 2, 4, 12 weeks after the operation, both CNTF group and SAL group undergone electrophysiology test and histopathology as well as quantity analysis. RESULT: Two weeks later, both CNTF and SAL group failed in eliciting muscular excitement by stimulating facial nerve; T-test showed significant difference between the two groups(P < 0.05) about the average of myelinated axons 4 weeks later, the latency of facial muscular excitement was 7.650 +/- 2.702 ms in CNTF group and 16.080 +/- 0.162 ms in SAL group. The average number of myelinated axons was 1614 +/- 411 in experimental group and 1094 +/- 343 in control group. T-test showed significant difference between them (P < 0.05). 12 weeks later, latency of facial muscle excitement was 2.016 +/- 0.122 ms in CNTF group and 2.060 +/- 0.162 ms in SAL group. The average number of myelinated axons was 1909 +/- 332 in experimental group and 1847 +/- 422 in control group. T-test showed no significant difference between the two groups (P > 0.05). CONCLUSION: CNTF enhance facial nerve regeneration in adult SD rats.